Lower and raise the ramp to see how the Angle of inclination affects the parallel forces acting on the file cabinet.

把斜坡抬高或放低，看倾斜角度如何影响文件盒上的平行作用力。

youdao

Lower and raise the ramp to see how the Angle of inclination affects the parallel forces acting on the file cabinet.

把斜坡抬高或放低，看倾斜角度如何影响文件盒上的平行作用力。

youdao